Little Nemo: Adventures in Slumberland - Cast

Cast

• Takuma Gōno (Gabriel Damon in the English adaption) as Nemo: the protagonist of the movie. He is a human boy living in New York City who is taken to Slumberland to be the official playmate of Princess Camille; in actuality, however, he is being summoned to be the heir to the elderly King Morpheus. He is given the key to Slumberland, but is warned by the king to leave a door with a coiled dragon emblazoned on it closed. Sadly, he opens the aforementioned door when he is tempted by Flip and goes on a quest to restore Slumberland to its rightful glory, save King Morpheus and defeat the Nightmare King.

• Chikao Ōtsuka (Mickey Rooney in the English adaption) as Flip: a supporting protagonist of the movie. Described as a "frightful fellow" by Professor Genius, he is wanted throughout Slumberland for "having fun" (the bounty on his head is a sizeable one) and his only friend is his partner-in-crime: a bird named Flap. He tricks Nemo into accidentally releasing the Nightmare King and blames him for the ruin of Slumberland. He is in possession of a map of Nightmare Land (hand-drawn and written in his own special code) and serves as the guide to the Nightmare Castle until he is replaced by the Boomps. He has a serious smoking addiction. In the real world, he is a clown in a circus that stops in Nemo's town.

• Kōichi Kitamura (René Auberjonois in the English adaption) as Professor Genius: King Morpheus' advisor and a supporting protagonist of the movie. He comes to the real world to bring Nemo to Slumberland. A sophisticated man, he is quite punctual and prefers order as opposed to madness. He is quite a dancer, as he dances quite a bit during Nemo's coronation ceremony. In the real world, he is an organ player in a circus that stops in Nemo's town.

• Danny Mann as Icarus: a flying squirrel, Nemo's best friend and a supporting protagonist of the movie. Icarus is Nemo's only friend from the real world. He shows great concern for Nemo's wellbeing in a sense similar to that of two siblings. He speaks a mix of both squirrel and some English. His screech is painful to the ears of the Boomps. He detests being called a "little rat" (which Princess Camille mistakes him for). Unlike other squirrels, Icarus eats human food, like cookies. His initial relationship with Princess Camille, though rough, eventually changes for the better.

• Kenji Utsumi (Bernard Erhard in the English adaption) as King Morpheus: the elderly ruler of Slumberland and a supporting protagonist of the movie. He has protected Slumberland for years with the help of the royal scepter: an ancient weapon of great power. Though he is a child at heart, he knows when to be serious. He has Nemo brought to Slumberland so that he may become his heir to the throne. He gives Nemo the key to Slumberland, which can open any door; however, he warns Nemo of one door with a dragon symbol emblazoned on it that must never be opened. Like Professor Genius, he is quite a dancer, as he dances alongside the Professor during Nemo's coronation ceremony. When Nemo accidentally releases the Nightmare King, King Morpheus is captured and Nemo has to go and rescue him from Nightmare Land. In the real world, he is the ringmaster of a circus that stops in Nemo's town.

• Tarō Ishida (Bill Martin the English adaption) as the Nightmare King: the main antagonist of the movie. He is a demonic creature who was locked behind a massive door until he was accidentally set free by Nemo, who was given the key to the door by King Morpheus. Once free, he captures King Morpheus as revenge for his imprisonment and then retreats to the Nightmare Castle. When Nemo goes to the castle to save King Morpheus, the Nightmare King has his minions capture Nemo's friends (Professor Genius, Flip and Princess Camille). He is shown to be quite temperamental, as he destroys several minions for the failure of just one of his underlings (the general of his army). The only thing that can defeat him is the legendary royal scepter.

• Hiroko Kasahara (Laura Mooney in the English adaption) as Princess Camille: the daughter of King Morpheus and a supporting protagonist of the movie. Though she initially acts somewhat spoiled, she eventually grows to like Nemo. She also grows fond of Icarus (and vice versa, despite a rough start). When her father is kidnapped by the Nightmare King, she takes over as ruler but decides to join Nemo in his quest to save King Morpheus. In the real world, she is the daughter of the ringmaster of a circus that stops in Nemo's town.

• Tesshō Genda (Greg Burson in the English adaption) as Nemo's father

• Mari Yokō (Jennifer Darling in the English adaption) as Nemo's mother

• Hiroshi Ōtake (Neil Ross in the English adaption) as Oompa

• Keiichi Nanba (Alan Oppenheimer in the English adaption) as Oomp

• Masaharu Satō (John Stephenson in the English adaption) as Oompo

• Kōzō Shioya (Sidney Miller in the English adaption) as Oompe

• Hiroko Emori (Michael Bell in the English adaption) as Oompy

• Kimie Nakajima (Kathleen Freeman in the English adaption) as the dance teacher

• Seiko Nakao (Bever-Leigh Banfield in the English adaption) as the woman

• Kazumi Tanaka (John Stephenson in the English adaption) as the dirigible captain

• Yukimasa Kishino (Bert Kramer in the English adaption) as a goblin: A hideous creature that serves as a member of the Nightmare King's army. They are sent by the Nightmare King to ensure that Nemo doesn't reach his castle and free King Morpheus. Though the goblins succeed in capturing most of Nemo's friends, they fail to capture Nemo himself and, when the Nightmare King finds out, he kills them all in a fit of rage. The only goblins to survive are the Boomps (who, in contrast to the other goblins, are not hideous and are actually friendly).

• Tarō Arakawa (Beau Weaver in the English adaption) as a policeman